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Claim 1

IN A DEMOUNTABLE AND ANGULARLY ADJUSTABLE SHELVING CONSTRUCTION, (A) A BASE HAVING SPACED-APART SIDE PORTIONS, (B) SPACED-APART MEANS RESPECTIVELY EXTENDING UPWARDLY FROM SAID SIDE PORTIONS AND HAVING VERTICALLY AND HORIZONTALLY SPACED PIN-RECEIVING BORES THEREIN, (C) AT LEAST ONE PAIR OF OPPOSITELY DISPOSED SPACEDAPART CHANNELS RESPECTIVELY ASSOCIATED WITH SAID MEANS, SAID CHANNELS EACH HAVING A WEB AND OPENING INWARDLY OF SAID BASE AND AWAY FROM THE ASSOCIATED MEANS, (D) SAID CHANNELS EACH HAVING A REAR PORTION AND A FORWARD PORTION, (E) A LONGITUDINALLY EXTENDING SLOT IN THE WEB OF EACH OF SAID CHANNEL FORWARD PORTIONS, (F) A REAR PIN SECURED TO EACH OF SAID REAR PORTIONS AND EXTENDING OUTWARDLY OF SAID BASE AND ADAPTED FOR INSERTION INTO A SELECTED RECEIVING BORE, (G) A FORWARD PIN ENGAGING IN EACH OF SAID SLOTS AND EXTENDING OUTWARDLY OF SAID BASE AND EACH ADAPTED FOR INSERTION INTO A SELECTED RECEIVING BORE, (H) SAID FORWARD PINS HAVING A DIAMETER SLIGHTLY SMALLER THAN THE WIDTH OF SAID SLOTS, (I) A HEAD ON THE INNER END OF EACH OF SAID FORWARD PINS OF GREATER DIAMETER THAN THE WIDTH OF SAID SLOTS, AN ANNULAR DISC OF GREATER DIAMETER THAN THE WIDTH OF SAID SLOTS SECURED TO EACH OF SAID FORWARD PINS, SAID DISC AND HEAD BEING LOCATED ON THE OPPOSITE SIDES OF THE WEB OF THE CHANNEL AND SPACED APART A DISTANCE SUFFICIENT TO PERMIT SLIDING MOVEMENT OF SAID FORWARD PINS LONGITUDINALLY OF SAID SLOTS AND PROVIDE SUPPORT AGAINST SUBSTANTIAL MOVEMENT OF SAID FORWARD PINS TRANSVERSELY OF SAID CHANNELS, AND (J) A SHELF HAVING LATERAL END PORTIONS RESPECTIVELY ADAPTED TO BE RECEIVED IN SAID CHANNELS, WHEREBY SAID SHELF IS ADJUSTABLE TO VARIOUS ANGULAR AND ELEVATED POSITIONS WITH RESPECT TO SAID FIRST-NAMED MEANS.